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(No Model.) 2 Sheets-Sheet: 1.

O. W. PARSONS. SGREEN AND SEPARATOR FOR GOAL, &c.

Patented Sept. 1, 1896 FIG.

W WW w: mums PETERS cu. Pnmcxuwo, WASH'INGYGN, n c

(No Model.) 2 Sheets-Sheet 2.

G. W. PARSON5. SGREEN AND SEPARATOR FOR GOAL, &c.

Patented Sept. 1

INVENTOR WITNESSES m: mums. PETERS co, mowaumon WASHINGTGN. o c.

UNITED STATES PATENT @rrrcn.

CALVIN WV. PARSONS, OF SGRANTON, PENNSYLVANIA, ASSIGNOR OF ONE- l-IALFTO THOMAS J. FOSTER, OF SAME PLACE.

SCREEN AND SEPARATOR FOR COAL, 800.

SPECIFICATION forming part of Letters Patent No. 566,793, datedSeptember 1, 1896.

Application filed July 9, 1894:. Serial No. 516,947. (No model.)

1'0 all whom it may COILCCIIL. table over which the cross-bars B may beBe it known that I, CALVIN WV. PARSONS, a propelled in the directionindicated by the citizen of theUnited States, residing at Scranarrow.The cross-bars B, which may be ton, in the county of Lackawanna andState round, square, or any desired shape, may be 5 5 of Pennsylvania,have invented certain new attached to the links of the chain C, so thatand usefullmprovementsin Screens and Septheir ends become the pins orrivets of the arators for Coal and other Materials; andI do links oftheir propelling-chain C, but any declare the following to be a full,clear, and method of attachment will suffice, the princiexactdescription of the invention, such as will pal requirements being thatthey be securely 1o enable others skilled in the art to which itapattached, and that they be parallel at right pertains to make and usethe same, reference angles to the table and at equal distances being hadtotheaccompanying drawings, and from one another. The longitudinal barsto the letters and figures of reference marked A may also be secured andsupported in thereon, which form a part of this specificaany desiredmanner, but mustbe well se- I 5 tion. cured and equally distanced fromone another. The object of my invention is to afford a One of theprincipal features of my machine more convenient, economical, andeffective is in the arrangement of these sets of bars A screen andseparator for separating or gradand B. The arrangement is clearly showning coals and other materials than those in Fig. 4, where the nearpropelling-chain is 2o heretofore in use. removed. It will be observedthat the widths My invention consists in the construction, of the holesthrough which material may pass combination, and arrangement of parts,as are determined by the distance between the hereinafter fully setforth and claim ed. longitudinal bars, and that the lengths of the Inthe accompanying drawings, forming a said holes are determined by thedistance be- 7 5 25 part of this specification, Figure 1 is a side tweenthe cross-bars B.

View or elevation of one of my separators, The chains 0 pass oversprockets D and D, partly in section. Fig. 2 is a top view of thesupported,respectively,by the bearings J and same. Fig. 3 isaverticalcross-section of the J, attached to the beam or sill K of the upper partof Fig. 1 on the line a: y. Fig. 4 is framework or base of the machine.A sec- 30 a View in isometric perspective of the upper end series oflongitudinal bars A are artable of one of my machines, showing the anranged underneath, as indicated by the dotrangement of the bars andtheir connection to ted lines in Fig. 2. These are placed closer thechain. Fig. 5 is a diagram showing the together than the upper set, andthus are stationary bars of my screen in diverging p0 used to separate asize smaller than that sep- 8 5 35 sitions. Fig. (i is a diagram showingthe staarated by the upper set. The cross-bars are tionary bars of myscreen made in zigzag form. propelled over the lower set on their returnSimilar letters and figures of reference inrun, as shown in Fig. 1.dicate similar parts throughout the several 5 and G in Fig. 1 are chutesfor the purviews. pose of conducting that which falls through 40Referring to the drawings, A represents the upper bars to the head ofthe run on the longitudinal stationary iron bars made of lower bars.tapering iron with the thinner edges down- F. and E are guard-strips tokeep the maward. These bars may have their upper terial from falling.ofi at the sides of the maedges plain, as shown in Fig. 4, or they maychine. 45 be made with offsets, as at 2 2, Fig. 7, de- F is atail-chigte for conducting away the signed to give greater agitation tothe cross larger sizes sep rated by the upper run or bars which are tobe propelled over them. table. I

The bars A are placed at a distance apart The hopper of the machine isrepresented corresponding to the size of the coal, 8.20., to at g, andit is fitted with a gate G, by which 50 be separated and their upperedges are in the feed of the machine may be regulated.

the same plane, so as to form a platform or If the arrangement oflongitudinal bars,

as shown by the diagram in Fig. 5, is substituted for the arrangementshown in thefirst four figures, several grades or sizes may be separatedin one run of the cross-bars. Thus it will be seen that the mesh formedat 3. would separate a smaller size than the mesh at at, and there wouldbe intermediate sizes separated on the sections of the run between thelines N and O and the lines M and N. Partitions maybe located at theselines, and it is evident that the sizes of material which will fall intoeach bin thus divided oif can be adjusted by moving the said partitionslengthwise of the machine. The barsA may be zigzagged concurrently in ahorizontal plane, as shown in Fig. 6, which arrangement eficctuallyprecludes pieces from being carried along, partially supported by across-bar and partially by sliding contact with a longitudinal bar.'lhis'arrangement is found useful for grading wet coal.

The operation of my machine will now be. readily understood. It will beassumed that coal is the material to be screened or sepa rated.

The broken coalis fed into the hopper g and the gate G raisedsufficiently to let the coal escape asfast as is desired on to thescreening-table, composed of the bars A and the cross-bars B. Power isapplied to the shaft d, Fig. 2, and the sprocket revolved so as to movethe cross-bars in the direction indicated. The coal which is too largeto pass through the upper screen is carried off the end of the machineand conducted away by the chute F. The smaller coal falls through and iscaught by the chutes 5 and 6 and carried to the head of the bars. A. Thesizes which are too large to pass between these bars, which are closerthan the bars A, are carried beyond the end of the longitudinal bars Aand drop through between the crossbars B, and are conducted away by thechute I. The smallerlumps,which pass through the lower bars A, may befurther screened by means of other sets of bars, duplicates of themachinejust described, except that the bars are closer than theforegoing, thus making a screen of finer mesh, and this process isfollowed out until the finest or smallest sizes desired are separated.

It will be obvious that by my invention I provide a screen comprisinglongitudinal bars which in one form may be arranged in an upper and alower series and in another form be arranged in the same plane in eachHaving thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In an organized screening and grading machine of the kind described,the combination of a series of upper, and a series of lower longitudinalgrading-bars, the distance between the bars of the one series beinggreater than the distance between the bars of the other series; an apronprovided with transverse bars traveling over the said series oflongitudinal bars in opposite directions, and means for moving saidapron.

2. In a screening or grading machine of the kind described an uppertable composed of equidistant fixed longitudinal bars, a lower tablecomposed of a diiferent series of equidistant fixed longitudinal bars,in combination with a continuous apron composed of the chains C, O,andthe equidistant crossbars B, B, and said apron being adapted to bedrawn over the said upper and lower tables in opposite directions bymeans of the driving-wheels D, D; and the cross-bars of the said apronadapted to cooperate with the fixed longitudinal bars of each series soas to form the transverse components of the meshes of the screenssubstantially as shown.

3. In a screening or grading machine of the kind described, thecombination of an upper table composed of aseries of fixed longitudinalbars, a lower table composed of a series of fixed longitudinal bars incloser relation than those of the upper table; and the apron composed ofthe chainsC, O and cross-bars B, B adapted to be drawn over said upperand lower tables in opposite directions by means of the driving-wheelsD, D; and the cross-bars B B of said apron adaptedto cooperate with eachseries of'longitudinal fixed bars soas to formthe transverse componentsof the meshes of thescreens, substantially as shown.

In testimony whereof I affix my signature in presence of two witnesses.

CALVIN .W'. PARSONS.

WVitnesses:

DAVID J. EVANS, CHAS. L. HAWLEY,

